brcm2708: remove linux 4.4 support

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 0 insertions, 270 deletions

diff --git a/target/linux/brcm2708/patches-4.4/0222-bcm2835-sdhost-Precalc-divisors-and-overclocks.patch b/target/linux/brcm2708/patches-4.4/0222-bcm2835-sdhost-Precalc-divisors-and-overclocks.patch
deleted file mode 100644
index a35c8b1e79..0000000000
--- a/target/linux/brcm2708/patches-4.4/0222-bcm2835-sdhost-Precalc-divisors-and-overclocks.patch
+++ /dev/null
@@ -1,270 +0,0 @@
-From 152daaa4a44dfa67ec4c975d0f3446b38fe047bd Mon Sep 17 00:00:00 2001
-From: Phil Elwell <phil@raspberrypi.org>
-Date: Thu, 31 Mar 2016 15:44:53 +0100
-Subject: [PATCH] bcm2835-sdhost: Precalc divisors and overclocks
-
-Recalculating the clock divisors when the core clock changes is wasteful
-and makes it harder to manage the overclock settings. Instead,
-precalculate them and only report significant changes.
-
-Signed-off-by: Phil Elwell <phil@raspberrypi.org>
----
- drivers/mmc/host/bcm2835-sdhost.c | 152 ++++++++++++++++++++++----------------
- 1 file changed, 88 insertions(+), 64 deletions(-)
-
---- a/drivers/mmc/host/bcm2835-sdhost.c
-+++ b/drivers/mmc/host/bcm2835-sdhost.c
-@@ -154,12 +154,15 @@ struct bcm2835_host {
- 	u32			pio_timeout;	/* In jiffies */
- 
- 	int			clock;		/* Current clock speed */
-+	int			clocks[2];
- 
- 	bool			slow_card;	/* Force 11-bit divisor */
- 
- 	unsigned int		max_clk;	/* Max src clock freq */
--	unsigned int		min_clk;	/* Min src clock freq */
--	unsigned int		cur_clk;	/* Current src clock freq */
-+	unsigned int		src_clks[2];	/* Min/max src clock freqs */
-+	unsigned int		cur_clk_idx;	/* Index of current clock */
-+	unsigned int		next_clk_idx;	/* Next clock index */
-+	unsigned int		cdivs[2];
- 
- 	struct tasklet_struct	finish_tasklet;	/* Tasklet structures */
- 
-@@ -213,7 +216,7 @@ struct bcm2835_host {
- 	u32				delay_after_stop; /* minimum time between stop and subsequent data transfer */
- 	u32				delay_after_this_stop; /* minimum time between this stop and subsequent data transfer */
- 	u32				overclock_50;	/* frequency to use when 50MHz is requested (in MHz) */
--	u32				overclock;	/* Current frequency if overclocked, else zero */
-+	u32				prev_overclock_50;
- 	u32				pio_limit;	/* Maximum block count for PIO (0 = always DMA) */
- 
- 	u32				sectors;	/* Cached card size in sectors */
-@@ -1509,10 +1512,35 @@ static irqreturn_t bcm2835_sdhost_irq(in
- 	return result;
- }
- 
-+static void bcm2835_sdhost_select_clock(struct bcm2835_host *host, int idx)
-+{
-+	unsigned int clock = host->clocks[idx];
-+	unsigned int cdiv = host->cdivs[idx];
-+
-+	host->mmc->actual_clock = clock;
-+	host->ns_per_fifo_word = (1000000000/clock) *
-+		((host->mmc->caps & MMC_CAP_4_BIT_DATA) ? 8 : 32);
-+
-+	host->cdiv = cdiv;
-+	bcm2835_sdhost_write(host, host->cdiv, SDCDIV);
-+
-+	/* Set the timeout to 500ms */
-+	bcm2835_sdhost_write(host, clock/2, SDTOUT);
-+
-+	host->cur_clk_idx = host->next_clk_idx = idx;
-+
-+	if (host->debug)
-+		pr_info("%s: clock=%d -> src_clk=%d, cdiv=%x (actual %d)\n",
-+			mmc_hostname(host->mmc), host->clock,
-+			host->src_clks[idx], host->cdiv,
-+			host->mmc->actual_clock);
-+}
-+
- void bcm2835_sdhost_set_clock(struct bcm2835_host *host)
- {
- 	int div = 0; /* Initialized for compiler warning */
- 	unsigned int clock = host->clock;
-+	int clk_idx;
- 
- 	if (host->debug)
- 		pr_info("%s: set_clock(%d)\n", mmc_hostname(host->mmc), clock);
-@@ -1553,53 +1581,45 @@ void bcm2835_sdhost_set_clock(struct bcm
- 	    return;
- 	}
- 
--	div = host->cur_clk / clock;
--	if (div < 2)
--		div = 2;
--	if ((host->cur_clk / div) > clock)
--		div++;
--	div -= 2;
--
--	if (div > SDCDIV_MAX_CDIV)
--	    div = SDCDIV_MAX_CDIV;
--
--	clock = host->cur_clk / (div + 2);
--	host->mmc->actual_clock = clock;
--
--	/* Calibrate some delays */
--
--	host->ns_per_fifo_word = (1000000000/clock) *
--		((host->mmc->caps & MMC_CAP_4_BIT_DATA) ? 8 : 32);
-+	/* Calculate the clock divisors */
-+	for (clk_idx = 0; clk_idx <= host->variable_clock; clk_idx++)
-+	{
-+		unsigned int cur_clk = host->src_clks[clk_idx];
-+		unsigned int actual_clock;
- 
--	if (clock > host->clock) {
--		/* Save the closest value, to make it easier
--		   to reduce in the event of error */
--		host->overclock_50 = (clock/MHZ);
--
--		if (clock != host->overclock) {
--			pr_warn("%s: overclocking to %dHz\n",
--				mmc_hostname(host->mmc), clock);
--			host->overclock = clock;
-+		div = cur_clk / clock;
-+		if (div < 2)
-+			div = 2;
-+		if ((cur_clk / div) > clock)
-+			div++;
-+		div -= 2;
-+
-+		if (div > SDCDIV_MAX_CDIV)
-+			div = SDCDIV_MAX_CDIV;
-+		actual_clock = cur_clk / (div + 2);
-+
-+		host->cdivs[clk_idx] = div;
-+		host->clocks[clk_idx] = actual_clock;
-+
-+		if (host->overclock_50 != host->prev_overclock_50) {
-+			const char *clk_name = "";
-+			if (host->variable_clock)
-+				clk_name = clk_idx ? " (turbo)" : " (normal)";
-+			if (actual_clock > host->clock)
-+				pr_info("%s: overclocking to %dHz%s\n",
-+					mmc_hostname(host->mmc),
-+					actual_clock, clk_name);
-+			else if ((host->overclock_50 < 50) && (clk_idx == 0))
-+				pr_info("%s: cancelling overclock%s\n",
-+					mmc_hostname(host->mmc),
-+					host->variable_clock ? "s" : "");
- 		}
- 	}
--	else if (host->overclock)
--	{
--		host->overclock = 0;
--		if (clock == 50 * MHZ)
--			pr_warn("%s: cancelling overclock\n",
--				mmc_hostname(host->mmc));
--	}
- 
--	host->cdiv = div;
--	bcm2835_sdhost_write(host, host->cdiv, SDCDIV);
-+	if (host->clock == 50*MHZ)
-+		host->prev_overclock_50 = host->overclock_50;
- 
--	/* Set the timeout to 500ms */
--	bcm2835_sdhost_write(host, host->mmc->actual_clock/2, SDTOUT);
--
--	if (host->debug)
--		pr_info("%s: clock=%d -> cur_clk=%d, cdiv=%x (actual clock %d)\n",
--			mmc_hostname(host->mmc), host->clock,
--			host->cur_clk, host->cdiv, host->mmc->actual_clock);
-+	bcm2835_sdhost_select_clock(host, host->cur_clk_idx);
- }
- 
- static void bcm2835_sdhost_request(struct mmc_host *mmc, struct mmc_request *mrq)
-@@ -1657,6 +1677,9 @@ static void bcm2835_sdhost_request(struc
- 
- 	spin_lock_irqsave(&host->lock, flags);
- 
-+	if (host->next_clk_idx != host->cur_clk_idx)
-+		bcm2835_sdhost_select_clock(host, host->next_clk_idx);
-+
- 	WARN_ON(host->mrq != NULL);
- 	host->mrq = mrq;
- 
-@@ -1719,11 +1742,7 @@ static int bcm2835_sdhost_cpufreq_callba
- 				return NOTIFY_BAD;
- 			break;
- 		case CPUFREQ_POSTCHANGE:
--			if (freq->new > freq->old)
--				host->cur_clk = host->max_clk;
--			else
--				host->cur_clk = host->min_clk;
--			bcm2835_sdhost_set_clock(host);
-+			host->next_clk_idx = (freq->new > freq->old);
- 			up(&host->cpufreq_semaphore);
- 			break;
- 		default:
-@@ -1763,8 +1782,11 @@ static void bcm2835_sdhost_set_ios(struc
- 			ios->clock, ios->power_mode, ios->bus_width,
- 			ios->timing, ios->signal_voltage, ios->drv_type);
- 
--	if (ios->clock && !host->cur_clk)
--		host->cur_clk = get_core_clock(RPI_FIRMWARE_GET_CLOCK_RATE);
-+	if (ios->clock && (host->cur_clk_idx == -1)) {
-+		unsigned int cur_clk =
-+			get_core_clock(RPI_FIRMWARE_GET_CLOCK_RATE);
-+		host->cur_clk_idx = (cur_clk == host->src_clks[0]) ? 0 : 1;
-+	}
- 
- 	spin_lock_irqsave(&host->lock, flags);
- 
-@@ -1854,11 +1876,12 @@ static void bcm2835_sdhost_tasklet_finis
- 
- 	/* Drop the overclock after any data corruption, or after any
- 	   error overclocked */
--	if (host->overclock) {
-+	if (host->clock > 50*MHZ) {
- 		if ((mrq->cmd && mrq->cmd->error) ||
- 		    (mrq->data && mrq->data->error) ||
- 		    (mrq->stop && mrq->stop->error)) {
--			host->overclock_50--;
-+			host->overclock_50 = (host->clock/MHZ) - 1;
-+
- 			pr_warn("%s: reducing overclock due to errors\n",
- 				mmc_hostname(host->mmc));
- 			bcm2835_sdhost_set_clock(host);
-@@ -2022,7 +2045,7 @@ static int bcm2835_sdhost_probe(struct p
- 	struct bcm2835_host *host;
- 	struct mmc_host *mmc;
- 	const __be32 *addr;
--	unsigned int max_clk;
-+	unsigned int max_clk, min_clk;
- 	int ret;
- 
- 	pr_debug("bcm2835_sdhost_probe\n");
-@@ -2128,12 +2151,8 @@ static int bcm2835_sdhost_probe(struct p
- 	else
- 		mmc->caps |= MMC_CAP_4_BIT_DATA;
- 
--	ret = bcm2835_sdhost_add_host(host);
--	if (ret)
--		goto err;
--
- 	/* Query the core clock frequencies */
--	host->min_clk = get_core_clock(RPI_FIRMWARE_GET_MIN_CLOCK_RATE);
-+	min_clk = get_core_clock(RPI_FIRMWARE_GET_MIN_CLOCK_RATE);
- 	max_clk = get_core_clock(RPI_FIRMWARE_GET_MAX_CLOCK_RATE);
- 	if (max_clk != host->max_clk) {
- 		pr_warn("%s: Expected max clock %d, found %d\n",
-@@ -2141,19 +2160,24 @@ static int bcm2835_sdhost_probe(struct p
- 		host->max_clk = max_clk;
- 	}
- 
--	if (host->min_clk != host->max_clk) {
-+	host->src_clks[0] = min_clk;
-+	host->cur_clk_idx = -1;
-+	if (max_clk != min_clk) {
-+		host->src_clks[1] = max_clk;
- 		host->cpufreq_nb.notifier_call =
- 			bcm2835_sdhost_cpufreq_callback;
- 		sema_init(&host->cpufreq_semaphore, 1);
- 		cpufreq_register_notifier(&host->cpufreq_nb,
- 					  CPUFREQ_TRANSITION_NOTIFIER);
- 		host->variable_clock = 1;
--		host->cur_clk = 0; /* Get this later */
- 	} else {
- 		host->variable_clock = 0;
--		host->cur_clk = host->max_clk;
- 	}
- 
-+	ret = bcm2835_sdhost_add_host(host);
-+	if (ret)
-+		goto err;
-+
- 	platform_set_drvdata(pdev, host);
- 
- 	pr_debug("bcm2835_sdhost_probe -> OK\n");